I have not seen the second edition but I used Amazon's "Look Inside" feature and it appears very similar to the first edition. Tom Archer wrote the orginal without Andrew Whitechapel. I'm guessing that this is a minor revision.

The reason that "Inside C#" is such a great book is the way that Tom Archer explaiins c# ... you do not even use an IDE like Visual Studio. Tom Archer has you use a text editor like notepad and the c# command line compiler. Later, when
you're using Visual Studio you'll have a better understanding of what Visual Studio does when it's building your c# applications.

You also likely want to get the very useful free tool LINQPad. Read about it here:
http://www.linqpad.net/. LINQPad gives you the ability to try out c# statements and expressions, et cetera. Think of LINQPad as a programmer's scratch pad.

The reason to read "Inside C#" is to get started ... you'll later need to learn new features that have been introduced with later versions of c#.